Fresh air module testing device and system

Abstract

The utility model discloses a fresh air module testing device and a fresh air module testing system, and belongs to the technical field of testing. The testing device comprises a testing bin, a testing assembly arranged in the testing bin and a testing controller arranged on the testing bin, wherein the testing assembly comprises a wind speed sensor and an acoustic array; the test controller is electrically connected with the test assembly and is provided with an electric control connecting mechanism extending into the test bin, and the electric control connecting mechanism is used for being connected with the control end of the to-be-tested fresh air module, so that the test controller is in electric control connection with the to-be-tested fresh air module, and the to-be-tested fresh air module can be adjusted to work in different modes; the test controller is connected with the test assembly and can obtain the wind speed and abnormal sound sensing signals of the test assembly. According to the utility model, the air speed and abnormal sound of the fresh air module can be tested in a sealing manner; therefore, the wind speed and abnormal sound data of the fresh air module under each operation condition can be accurately measured.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection and testing, and particularly relates to a testing device and a testing system for detecting the wind speed and abnormal noise of a fresh air module. Background Art

[0002] The fresh air module, also known as the fresh air component or fresh air assembly, is a system component used to achieve the exchange of indoor air and outdoor air. It is widely used in air conditioners in hospitals, office buildings, shopping malls, residences and other environments. As an important component of the air conditioner, it is used to help improve the air quality of the corresponding environment.

[0003] Figure 1 Shown is a fresh air module 50, which has an air outlet 51, fan blades 52, and an air inlet 53. The fresh air module 5 primarily utilizes the air duct design between the air outlet 51 and the air inlet 53, and the cooperation between the fan blades and the air duct to achieve indoor and outdoor air circulation and ventilation. Furthermore, the fresh air module can filter, disinfect, and sterilize the incoming air, ensuring clean and healthy indoor air.

[0004] Clearly, the performance of fresh air modules in air conditioning systems directly impacts indoor air quality, comfort, and energy savings. However, existing fresh air modules face numerous challenges in maintaining air speed stability and controlling abnormal noise. In particular, achieving consistent air speeds and low abnormal noise levels under varying operating conditions is difficult. This not only impacts the overall performance of the air conditioning system but can also degrade the user experience.

[0005] Currently, the wind speed of fresh air modules is primarily measured through on-site manual testing by testers, and abnormal noise levels are primarily detected using decibel meters. This testing process not only places high demands on workers' physical strength and proficiency, but also lacks reliable time and process guarantees. Test results and conclusions are also controversial, and therefore do not meet the requirements of lean production. Utility Model Content

[0006] The purpose of the present invention is to provide a fresh air module testing device and a testing system, aiming to improve the fresh air module testing efficiency; the present invention is achieved through the following scheme.

[0007] A first aspect of the present invention provides a fresh air module testing device, comprising:

[0008] The test chamber includes a chamber body, a chamber door, and a bearing member disposed in the chamber body for bearing the fresh air module to be tested;

[0009] A test assembly is provided in the test chamber, comprising: a wind speed sensor for sensing the wind speed of the fresh air module to be tested; and an acoustic array for sensing abnormal sound of the fresh air module to be tested;

[0010] A test controller is arranged on the test chamber and is electrically connected to the test component; the test controller has an electrical control connection mechanism that extends into the test chamber and is used to connect to the control end of the fresh air module to be tested.

[0011] As a preferred technical solution, the front end face of the bin body is open, and the bin door is opened and closed at the front end face opening of the bin body; the supporting member is arranged at the bottom of the bin body.

[0012] As a preferred technical solution, at least four of the acoustic arrays are arranged around the supporting member.

[0013] As a preferred technical solution, at least one of the acoustic arrays is arranged on the warehouse door.

[0014] As a preferred technical solution, at least four of the acoustic arrays are arranged around the carrier through a three-dimensional adjustment bracket, and the directions of at least four of the acoustic arrays cover the air inlet, air outlet and fan blade parts of the fresh air module to be tested.

[0015] As a preferred technical solution, the wind speed sensor is arranged around the bearing component through a three-dimensional adjustment bracket, and the wind receiving end of the wind speed sensor is configured to face the exhaust port of the fresh air module to be tested.

[0016] As a preferred technical solution, the inner walls of the warehouse body and the warehouse door are provided with sound insulation cotton.

[0017] As a preferred technical solution, the test controller includes:

[0018] a data acquisition module connected to the wind speed sensor and the acoustic array;

[0019] A data processing module connected to the data acquisition module;

[0020] an alarm module connected to the data processing module;

[0021] An instruction generation module connected to the data processing module;

[0022] The electric control module is connected to the instruction generating module and is also connected to the electric control connection mechanism.

[0023] The fresh air module testing device provided by the above technical solution has the following beneficial effects: it can perform closed tests on the wind speed and abnormal sound of the fresh air module; the test controller can obtain the wind speed and abnormal sound sensing signals of the test component by connecting to the test component; the test controller can adjust the fresh air module to be tested to work in different modes (or power levels) by being electrically connected to the fresh air module to be tested; thereby accurately measuring the wind speed and abnormal sound data of the fresh air module under various operating conditions.

[0024] According to a second aspect of the present invention, a fresh air module testing system is provided, comprising at least two sets of the fresh air module testing devices described above, wherein the test controller of each set of the fresh air module testing devices further comprises a communication module; the test controller of one set of the fresh air module testing devices is configured as a host, and the test controllers of the other fresh air module testing devices are configured as slaves, and the host is communicatively connected to the slaves.

[0025] As a preferred technical solution, the test controller configured as the host further includes a data storage module and an information display module, which are respectively connected to the data processing module of the test controller configured as the host.

[0026] The beneficial effect of the fresh air module testing system provided by the above scheme is that at least two sets of fresh air module testing devices are formed into a testing system, and the test data of each slave can be collected through the communication connection between the host and other slaves, and the data is stored and further uploaded on the host side; thereby, the wind speed and abnormal sound tests of different working modes of multiple fresh air modules to be tested can be carried out separately, which is more efficient. The fresh air module testing system provided by the utility model has a higher degree of automation, and the data management is more centralized and comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a fresh air module.

[0028] Figure 2 This is a schematic diagram of the structure of the fresh air module testing device provided in a specific embodiment of the present utility model.

[0029] Figure 3 A detailed schematic diagram of the fresh air module testing device provided in a specific embodiment of the present utility model.

[0030] Figure 4 This is a block diagram of the structure of the test controller in the fresh air module test device provided in the specific implementation manner of the present utility model.

[0031] Figure 5 This is a schematic diagram of the structure of the fresh air module testing system provided in a specific embodiment of the present utility model.

[0032] Figure 6This is a block diagram of the test controller serving as the host in the fresh air module test system provided in the specific implementation manner of the present utility model.

[0033] Figure 7 This is a flow chart of wind speed testing in the testing method of the fresh air module provided in the specific implementation manner of the present utility model.

[0034] Figure 8 This is a flow chart of the sound pressure level test in the test method of the fresh air module provided in the specific embodiment of the present invention.

[0035] Figure 9 This is a flow chart of the abnormal sound test in the test method of the fresh air module provided in the specific implementation manner of the utility model. DETAILED DESCRIPTION

[0036] The technical solutions of the embodiments of the present invention are explained and illustrated below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "front", "back" and the like, indicating directions or positional relationships, are all based on the directions or relative positional relationships shown in the drawings, and are intended to facilitate a clear description of the structure of the product or device, and are not intended to limit the actual directions of the product or device during production, use, sales, etc.

[0037] Furthermore, the terms "first" and "second" are used solely for purposes of distinction within the description and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0038] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. Under the premise that there is no conflict between them, the technical features of each specific embodiment can be used interchangeably.

[0039] Combine Figure 2 and Figure 3 As shown, this embodiment provides a fresh air module testing device 100 for detecting the wind speed and abnormal sound of the fresh air module; the fresh air module testing device 100 includes: a testing chamber 10, a testing component 20 and a testing controller 30.

[0040] The test chamber 10 includes a chamber body 11, a chamber door 12 and a carrier 13. The carrier 13 is disposed in the chamber body 11 and is used to carry the fresh air module to be tested, for example Figure 1 Specifically, the silo 11 is a square silo with an opening at the front end thereof, a silo door 12 is openably arranged at the opening at the front end thereof, and a bearing member 13 is arranged at the bottom of the silo 11 .

[0041] The test component 20 is arranged in the test chamber 10, and the test component 20 includes a wind speed sensor 21 and an acoustic array 22; the wind speed sensor 21 is used to sense the wind speed of the fresh air module 50 to be tested, and the acoustic array 22 is used to sense abnormal sounds of the fresh air module 50 to be tested.

[0042] The test controller 30 is located above the test chamber 10 and is electrically connected to the test assembly 20. The two work together to test the fresh air module 50 under test within the test chamber 10. The test controller 30 includes a controller body and an electrical control connection mechanism (not shown). The controller body is used to control the test process, and the electrical control connection mechanism is used to extend into the test chamber 10 and connect to the control terminal of the fresh air module 50 under test, thereby adjusting the operating mode of the fresh air module 50, for example, controlling the fresh air module 50 to operate at high, medium, or low gears.

[0043] The fresh air module testing device 100 provided in this embodiment further includes a transfer rack 40 , on which the testing chamber 10 is fixedly mounted. The transfer rack 40 has moving wheels to facilitate the movement of the entire fresh air module testing device 100 .

[0044] The acoustic array 22 is composed of a number of miniature microphones arranged in an array, and is used to collect abnormal noise from the fresh air module 50 under different operating conditions. As a preferred embodiment, in the fresh air module testing device 100 provided in this embodiment, the test assembly 20 includes four acoustic arrays 22, which are arranged around the support 13. One acoustic array 22 is located on the door 12. When the door is closed, this acoustic array 22 is located in front of the support 13. In addition, three other acoustic arrays 22 are arranged on the left, right, and rear of the support 13.

[0045] Four acoustic arrays 22 are positioned around the support member using three-dimensionally adjustable brackets. This allows for easy adjustment of their height and angle, ensuring that the arrays 22 are oriented to cover the air inlet, outlet, and blades of the fresh air module under test. This allows for the collection of abnormal sounds from noise-prone locations such as the outlet, inlet, and blades, enabling a more comprehensive and comprehensive collection of the overall noise of the fresh air module under test 50.

[0046] In addition, the wind speed sensor 21 is arranged on the periphery of the supporting component 13 through a three-dimensional adjustment bracket, and the wind receiving end of the wind speed sensor 21 faces the exhaust port of the fresh air module 50 to be tested.

[0047] To eliminate interference from external airflow and noise, the test must be conducted in a soundproof environment. In this embodiment, the inner walls of the chamber body 11 and the chamber door 12 are both equipped with soundproofing pads 15. As a preferred embodiment, the chamber door 12 and the five panels (top, bottom, left, right, and rear) of the chamber body 11 have the same thickness and structure, and are all equipped with soundproofing pads 15 with sound-absorbing structures (sound-absorbing holes).

[0048] Combine Figure 4 As shown, the test controller 30 includes: a data acquisition module, a data processing module, an alarm module, an instruction generation module and an electronic control module. The data acquisition module is connected to the wind speed sensor 21 and the acoustic array 22, and is used to collect the sensing signals of the wind speed sensor 21 and the acoustic array 22. The data processing module is connected to the data acquisition module, and is used to analyze and process the collected data to determine whether there is any abnormality in the detection data. The alarm module is connected to the data processing module, and is used to alarm for abnormal detection data. The instruction generation module is connected to the data processing module, and is used to receive control information input by the user and generate corresponding control instructions. The electronic control module is connected to the instruction generation module, and is also connected to the electronic control connection mechanism, and is used to respond to control instructions, thereby controlling the working mode of the fresh air module 50 to be tested.

[0049] The fresh air module testing device 100 provided in the above embodiment can perform a closedness test on the wind speed and abnormal sound of the fresh air module 50; the test controller 30 can obtain the wind speed and abnormal sound sensing signals of the test component 20 by connecting to the test component 20, and analyze and process them; the test controller 30 can adjust the fresh air module 50 to work in different modes by being electrically connected to the fresh air module 50 to be tested; thereby accurately measuring the wind speed and abnormal sound data of the fresh air module under various operating conditions.

[0050] See also Figure 5 As shown, this embodiment also provides a fresh air module testing system, including at least two sets of fresh air module testing devices 100 described above. Figure 6 As shown, the test controller 30 of each set of fresh air module testing device also includes a communication module; the test controller of the first set of fresh air module testing device 100 is configured as a host, and the test controllers 30 of other fresh air module testing devices 100 are configured as slaves, and the host is communicatively connected to the slaves.

[0051] Continue to see Figure 6 The test controller 30 configured as a host also includes a data storage module and an information display module, which are respectively connected to the data processing module of the host.

[0052] The fresh air module test system provided by the above solution combines at least two sets of fresh air module test devices into a test system. Through the communication connection between the host and other slaves, it can collect the test data of each slave, and store and further upload the data on the host side; thereby, it is possible to test the wind speed and abnormal sound of different working modes of multiple fresh air modules to be tested, with a higher degree of automation, higher efficiency, and more centralized and comprehensive data management.

[0053] In addition, based on the above-mentioned fresh air module testing device 100, this embodiment also provides a fresh air module testing method, including:

[0054] (1) Set the sampling frequency of the acoustic array 22 and the wind speed sensor 21, for example, the sampling frequency is 48 kHz.

[0055] (2) Conduct at least one of the following tests: wind speed test, sound pressure level test, or abnormal sound test:

[0056] When the test starts, the fresh air module in the test chamber will start to operate, and the four acoustic arrays 22 will respectively receive the noise signals of the fresh air module air inlet, the fresh air module air outlet, and the fresh air module fan blades in each fresh air working condition, and then convert the received signals into sound pressure curves through signal conversion and send them to the electronic control host. The host analyzes and calculates the curves, and finally evaluates and automatically outputs the test results. If the test results do not meet the standards, they are automatically sent to the alarm device in the control box for alarm. The wind speed test is synchronized with the noise test through the wind speed sensor 21 set at the air outlet of the fresh air module to collect data. The wind speed data of the entire operation process is collected under each working condition, and the collected data signals are transmitted to the electronic control host and the data is pre-processed (such as removing outliers, etc.), and then the output results are calculated and analyzed based on the data. If the test results do not meet the standards, they are automatically sent to the alarm device in the control box for alarm.

[0057] 2.1. Wind speed test:

[0058] The process of wind speed test is as follows Figure 7 As shown in the figure, in each fresh air working condition, the wind speed curve of the entire operation process is obtained through the wind speed sensor, and the maximum value, minimum value, average value and standard deviation of the wind speed curve are calculated to evaluate the overall level and fluctuation of the wind speed in each working condition.

[0059] 2.2 Sound pressure level test:

[0060] Since the human ear has different sensitivities to sounds of different frequencies, in order to obtain a sound pressure level close to the human ear's hearing perception, the A-weighted sound pressure level is used to evaluate the noise level of the fresh air module, taking into account the frequency response characteristics of the human ear to sound.

[0061] The process of sound pressure level test is as follows Figure 8As shown in the figure, in each fresh air condition, the A-weighted sound pressure level at each acoustic array is calculated at fixed time intervals to obtain four sound pressure level curves corresponding to the four acoustic arrays. The maximum, minimum, average and standard deviation of each curve are calculated to evaluate the overall level and fluctuation of the sound pressure level in each condition and at each position.

[0062] 2.3、Abnormal sound test:

[0063] The abnormal sound test of the fresh air module is carried out by combining machine learning and traditional feature engineering. The schematic diagram is as follows Figure 9 shown.

[0064] ①Build a deep neural network (feature extractor, decoder) and a prototype-based classifier.

[0065] ②Use the sound signal as the input of the feature extractor to extract learning features; at the same time, extract traditional time domain, frequency domain, and time-frequency domain features from the sound signal x.

[0066] ③ Use the learned features as the input of the decoder, reconstruct the sound signal x, and calculate the reconstruction error; at the same time, use the learned features and traditional features as the input of the prototype classifier, calculate the similarity between the sample and the prototype (normal sample), and further calculate the confidence that the sample is an abnormal sample.

[0067] ④ Use positive and abnormal samples to train the model, optimize the parameters of the feature extractor, decoder and prototype classifier, improve the model's ability to reconstruct normal samples, and improve the effectiveness of prototype and category confidence.

[0068] ⑤ Evaluate whether the fresh air module is abnormal through the reconstruction error and category confidence of the sample.

[0069] The above disclosure is only a preferred embodiment of the present application and cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A fresh air module testing device, characterized in that: include: The test chamber includes a chamber body, a chamber door, and a bearing member provided in the chamber body for bearing the fresh air module to be tested; A test assembly is provided in the test chamber, comprising: a wind speed sensor for sensing the wind speed of the fresh air module to be tested; and an acoustic array for sensing abnormal sound of the fresh air module to be tested; A test controller is arranged on the test chamber and is electrically connected to the test component; the test controller has an electrical control connection mechanism that extends into the test chamber and is used to connect to the control end of the fresh air module to be tested.

2. The fresh air module testing device according to claim 1, characterized in that: The front end face of the bin body is open, and the bin door is opened and closed at the front end face opening of the bin body; the bearing member is arranged at the bottom of the bin body.

3. The fresh air module testing device according to claim 1, characterized in that: It comprises at least four acoustic arrays, which are arranged around the supporting component.

4. The fresh air module testing device according to claim 3, characterized in that: At least one of the acoustic arrays is disposed on the cabin door.

5. The fresh air module testing device according to claim 4, characterized in that: At least four of the acoustic arrays are arranged around the carrier through three-dimensional adjustment brackets, and the directions of the at least four acoustic arrays cover the air inlet, air outlet and fan blade parts of the fresh air module to be tested.

6. The fresh air module testing device according to claim 1, characterized in that: The wind speed sensor is arranged on the periphery of the bearing component through a three-dimensional adjustment bracket, and the wind receiving end of the wind speed sensor is configured to face the exhaust port of the fresh air module to be tested.

7. The fresh air module testing device according to claim 1, characterized in that: The inner walls of the warehouse body and the warehouse door are provided with sound insulation cotton.

8. The fresh air module testing device according to any one of claims 1 to 7, characterized in that: The test controller comprises: a data acquisition module connected to the wind speed sensor and the acoustic array; A data processing module connected to the data acquisition module; an alarm module connected to the data processing module; An instruction generation module connected to the data processing module; The electric control module is connected to the instruction generating module and is also connected to the electric control connection mechanism.

9. A fresh air module testing system, characterized in that: It comprises at least two sets of the fresh air module test device according to any one of claims 1 to 8, and the test controller of each set of the fresh air module test device also includes a communication module; the test controller of one set of the fresh air module test device is configured as a host, and the test controllers of the other fresh air module test devices are configured as slaves, and the host is communicatively connected to the slaves.

10. The fresh air module testing system according to claim 9, characterized in that: The test controller configured as the host further includes a data storage module and an information display module, which are respectively connected to the data processing module of the test controller configured as the host.

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